JP2001121672A - Matter-to-be-printed conveyor for screen printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately convey a matter W to be printed to a printing center of a printing table. SOLUTION: When the same output signal is sent to a drive motor in a matter-to-be-printed conveying mechanism, each matter-to-be-printed conveying base 44 should move at the same conveying distance (reference conveying distance L) from an aligning unit A to a printing unit B. However, the base 44 is deviated at the unit B due to a conveying error. Then, a matter W to be printed positioned at an aligning center R of an aligning table 2 is previously deviated by this deviation G before conveying, the conveying starting point (a central position R between both front and rear position aligning marks N) of the matter W disposed at a fixed position, to the center P of a printing table 26 at the fixed position is changed, and a distance (actually conveying distance L+G) between the point (position R) and the center P is regulated at each base 44. Thus, even when the same signal is sent to the motor, the base 44 is moved by the actual distance L+L, and the position R of the matter W coincides with the center P.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for transporting a printing material in a screen printing machine in which a matching portion on a printing material loading side, a discharging portion on a printing material unloading side, and a printing portion between them are arranged side by side. In particular, the present invention relates to an apparatus for transporting a print material from an alignment table to a printing center of a print table by a print material transport table.

[0002]

2. Description of the Related Art Conventionally, in a printing material transporting mechanism of this type of screen printing machine, a winding transmission mechanism is disposed between an alignment section, a printing section and a discharge section, and a plurality of printing mediums are mounted on the winding transmission mechanism. A carriage is attached. FIG.
As schematically shown in FIG. 1, after the printing medium W supplied to the matching unit A is aligned with the alignment center R ₀ in the alignment table 2,
The print center P of the print table 26 is conveyed from the alignment section A to the printing section B from the printing object conveyance table 44 by the reference conveyance distance L between the alignment center R ₀ of the alignment table 2 and the print center P of the print table 26. Is set to

[0003]

However, due to the mechanical structure of the printing material transport mechanism, each printing material transport table 44 is stopped at a fixed position at the alignment section A. A transport error may occur while moving from the alignment unit A to the printing unit B. Therefore, in the printing section B, the stop position of each printing material transport base 44 is not constant, and a shift G occurs between each printing material transport base 44. If there is such a shift G, it is difficult to accurately transport the printing material W to the printing center P of the printing table 26.

An object of the present invention is to provide a method for transporting an object to be printed to a printing center of a printing table as accurately as possible, while assuming that the above-described deviation due to the transport error may occur.

[0005]

The present invention will be described with reference to the reference numerals in the drawings of the following embodiments (FIGS. 1 to 11). The screen printing machine according to claim 1 or 2 is
In each case, an alignment section (A) to which the printing medium (W) is supplied and positioned, a printing section (B) for printing the printing medium (W) after positioning by the printing mechanism (27), And a discharge section (C) from which the printed material (W) is carried out. Each of the printing medium transport devices of these screen printing machines is configured as follows.

A transport mechanism (1) is arranged over the alignment section (A), the printing section (B), and the discharge section (C), and the transport mechanism (1) is provided with a plurality of print substrate transport tables (44). Attached. Each of the printing material transport tables (44) is driven by the transport mechanism (1), and includes a processing path (46a) from the alignment unit (A) through the printing unit (B) to the discharge unit (C); It moves along a return path (46b) from (C) via the printing section (B) to the matching section (A). The alignment unit (A) includes an alignment table (2) for transferring the printing material (W) between the printing material transport table (44) that has reached the alignment unit (A) on the processing path (46a); A position adjustment drive unit (5) for adjusting the position of the alignment table (2). The printing unit (B) includes a printing table (26) in which the printing material (W) is transferred to and from the printing material transport table (44) that has reached the printing unit (B) on the processing path (46a). ing.

Further, the processing apparatus (60) according to the first aspect of the present invention is a processing apparatus (60) which includes a specific printing material transport table (44) among the printing material transport tables (44) reaching the printing section (B) in the processing path (46a). 44), and the print medium (W) is shifted by a shift (G) in the transport direction (Q) between the reference transport table (44S) and the print medium transport table (44) other than the reference transport table (44S). Position adjustment drive unit (5) so as to adjust the position of the alignment table (2) positioned at the alignment center (R ₀ ).
Drive. Further, the processing device (60) includes a matching center (R ₀ ) of the matching table (2) and a print table (2).
6) The actual transport distance (L + G) obtained by correcting the reference transport distance (L) from the print center (P) by the shift (G).
The transport mechanism (1) is driven so as to transport the printing material (W) transferred from the alignment table (2) to the printing material transport table (44) to the printing center (P) of the printing table (26).

Further, in the processing apparatus (60) according to the second aspect of the present invention, each of the printing object transport tables (44) reaching the printing section (B) in the processing path (46a) is a printing center of the printing table (26). (P), and the printing material transport table (4) which reaches the printing section (B) in the processing path (46a).
4) adjusts the position of the alignment table (2) on which the printing substrate (W) is positioned by a shift (G) generated between the printing table (26) and the actual position of the printing center (P). , And drives the position adjustment drive unit (5). Further, the processing device (60) performs the matching table (2)
The transport mechanism (1) is driven so that the printing medium (W) transferred from the printer to the printing medium transfer table (44) is transferred to the printing center (P) of the print table (26).

A third aspect of the present invention has the following configuration added to the second aspect of the present invention. The processing device (60) moves the processing path (46a) to a normal position where each printing material (W) reaching the alignment section (A) in the processing path (46a) is to be formed.
Then, the position adjustment drive section (5) is driven so as to match the actual position formed by the print substrate (W) reaching the alignment section (A). Further, the processing device (60) adjusts the position of the alignment table (2) in which the print substrate (W) is positioned, and transfers the print substrate transferred from the alignment table (2) to the print substrate transfer table (44). The transport mechanism (1) is driven to transport (W) to the print center (P) of the print table (26).

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a screen printing machine according to an embodiment of the present invention. In the screen printing machine schematically shown in FIG. 1, a matching section A on the side where the print material is loaded, a discharge section C on the side where the print material is discharged, and a printing section B therebetween are arranged in parallel. The printing medium transport mechanism 1 is disposed between the alignment section A, the printing section B, and the discharge section C. Substrate W
The electric wiring board (for example, an electric wiring board) is carried into the matching section A, and is conveyed from the matching section A to the discharge section C via the printing section B by the printing medium conveying mechanism 1, and then carried out from the discharge section C. The conveyance direction Q of the printing material W is referred to as the front-rear direction X, the printing material loading side is the front side, and the printing material unloading side is the rear side. A direction orthogonal to the assumed horizontal plane including the transport direction Q is defined as a left-right direction Y (see FIG. 2).

<Outline of Alignment Unit A shown in FIG. 1> The alignment unit A includes an alignment table 2, a positioning device 3, and a supply device 4.

The alignment table 2 is supported on a position adjusting drive 5. In this alignment table 2, as shown in FIGS.
7 extend in the left-right direction Y, between the front avoiding groove 6 and the rear avoiding groove 7, in front of the front avoiding groove 6, and behind the rear avoiding groove 7. Is formed. A vacuum pump 10 (see FIG. 6) is connected to the suction bases 8 and 9. The placement surfaces 8a and 9a on the suction bases 8 and 9 are suction surfaces having a large number of suction holes (not shown), and can be positioned by suction while the printing material W is placed thereon. . This matching table 2 is provided by the lifting unit 11
(See FIG. 6), it can be moved up and down together with the position adjustment drive unit 5.

[0013] As shown in FIG.
Is a support table 1 attached to the elevating section 11 (see FIG. 6).
2, a turntable 14 that turns on a turntable 13 on the support 12, and an X-direction guide 1 on the turntable 14.
And a moving table 17 that moves along the Y-direction guide 16. The turntable 14 is turned around a vertical axis 13a on an assumed horizontal plane by a servomotor 18 (drive unit). The moving table 17 is horizontally translated in the front-rear direction X by a servomotor 19 (drive unit) and horizontally horizontally in the left-right direction Y by a servomotor 20 (drive unit). Accordingly, the alignment table 2 is moved by the position adjustment drive unit 5 in the X direction and the Y direction, and is rotated in the θ direction on an assumed horizontal plane including the XY directions.

In the positioning device 3, both front and rear CCDs are provided above the front and rear avoidance grooves 6 and 7 of the alignment table 2.
The cameras 21 and 22 are installed, and the left and right CCD cameras 23 are installed above the rear avoidance groove 7.

The supply device 4 supplies the printing material W on the supply conveyor 24 onto the alignment table 2 by the suction arm 25. <Overview of the printing unit B shown in FIG. 1> The printing unit B includes a printing table 26 and a printing mechanism 27.

In the printing table 26, as shown in FIG. 2, avoidance grooves 28, 29 extend in the left-right direction Y on both front and rear sides of the upper surface, and the front avoidance groove 28 and the rear avoidance groove 29 Attraction portions 30 and 31 are formed in front of the front avoiding groove 28 and behind the rear avoiding groove 29, respectively. A vacuum pump 32
(See FIG. 6). The suction bases 30, 3
The upper mounting surfaces 30a and 31a are suction surfaces having a large number of suction holes (not shown), and can be positioned by suction while the printing material W is placed thereon. The print table 26 can be moved up and down by the elevating unit 33 (see FIG. 6).

The printing mechanism 27 includes the printing table 2
6 and is conventionally known, and is supported so as to be able to move up and down as shown in FIG. A plate frame 35 is attached below the machine frame 34 of the printing mechanism 27, and a screen plate 36 is stretched inside the plate frame 35. The vertically movable squeegee 37 and the doctor 38 reciprocate in the left-right direction Y along the screen plate 36.

<Outline of the discharging section C shown in FIG. 1> The discharging section C is provided with a discharging conveyor 40 which can be moved up and down by an elevating section 39 (see FIG. 6).

<Outline of Printed Material Transport Mechanism 1 shown in FIG. 1> The printed material transport mechanism 1 is a wrapping transmission mechanism, and includes a front left and right double chain gear 41 and a rear left and right double chain gear 42.
Between the right and left transmission chains 43 (wrapped transmission links)
Has been passed over. Between the left and right transmission chains 43, six printing material transport tables 44 are attached at equal intervals. The left and right transmission chains 43 are rotated by a drive motor 45. The drive of the drive motor 45 is controlled by a central processing unit 60 (described later) shown in FIG. By controlling the drive of the drive motor 45, each of the printing medium transport tables 4 is controlled.
4 is a processing path 46a from the alignment unit A to the discharge unit C via the printing unit B with the rotation of the right and left transmission chains 43.
And a return path 46b from the discharge unit C to the alignment unit A via the printing unit B while being guided by a guide (not shown).

<Improvement of the Printed Material Conveying Table 44> As shown schematically in FIG. 3, the printed material conveying table 44 is placed on both sides of the processing path 46a in the moving direction (X direction). Table portions 47 and 48 are provided, and connecting portions 4 are provided on both sides in the left-right direction Y.
The left and right connecting portions 49 and 50 are integrally connected to the left and right sides of the front mounting table 47 and the left and right sides of the rear mounting table 48. The front and rear mounting tables 47 and 48 and the left and right connecting parts 49 and 50 form a printing material transport base 44 in a frame shape, and an avoidance hole 55 is provided between them.

Each of the printing material transport tables 44 has a mounting surface 47 on the front side of the front and back sides of the front and rear mounting tables 47, 48.
a, 48a, and the front and rear mounting tables 4 in the processing path 46a.
After moving with the front side of 7, 48 upward, the discharge section C
At the boundary between the processing path 46a and the return path 46b, the upper and lower sides of the front and rear mounting tables 47 and 48 are moved downward on the return path 46b, and then the return path 46b and the processing path 46a in the matching unit A are moved downward. Upside down at the boundary with.

The front and rear mounting tables 47 and 48 of each of the printing material transport tables 44 are respectively provided with left and right grippers 57 (positioning members) that can take a locked state for positioning the printing material W and a unlocked state. Is provided. About this positioning means 56,
Although schematically illustrated, the left and right grippers 57 are moved in the left-right direction Y by the driving unit 58 (see FIG. 6) so that the left and right grippers 57 approach and separate from each other at the front and rear mounting tables 47 and 48, respectively. Gripping arm of gripper 57 (not shown)
Can be opened and closed with respect to the mounting surfaces 47a and 48a of the front and rear mounting tables 47 and 48 by a driving unit 59 (see FIG. 6). As the positioning means 56, a suction function may be used similarly to the alignment table 2 and the printing table 26.

<Overview of Electrical Configuration shown in FIG. 6> The central processing unit 60 includes a storage device 60a, a control device 60b, and an arithmetic device 60c, and stores programs stored in the storage device 60a and the matching unit A. Each CCD camera 21, 22, 2
3 and an instruction cycle and an execution cycle by the control device 60b are automatically performed based on data from the input unit 61 including operation keys and the like, and the servo motors 18 of the position adjustment drive unit 5 in the matching unit A are automatically operated. , 19, 20 (FIG. 4)
And the drive motor 45 of the printing medium transport mechanism 1.
(See FIG. 1) and a vacuum pump 1 for the matching table 2.
0, a vacuum pump 32 for the printing table 26 (shown only in FIG. 6), each of the elevating units 11, 33, 39 in the matching unit A, the printing unit B, and the discharging unit C (shown only in FIG. 6);
Each drive unit 58, 59 of each of the printing material transport tables 44 (FIG. 6)
) Is controlled as described later.

* Regarding the transport base correct position storage means and the print base correct position storage means As shown in FIG. 8, a specific print transfer base 44 (reference transfer base 44S) among the print transfer bases 44 is used for book printing. Move to the printing section B as in the case. This reference carrier 4
The reference position confirmation marks M (M ₀ ) are placed on the left and right sides of the rear mounting table 48 of the mounting tables 47 and 48 of the 4S, and the printing center P of the printing table 26 (between the printing marks on the screen plate 36). (Center position). Also,
With positioning the simulated printed material W ₀ to the reference carrier base 44S, while positioning the simulated printed material W ₀ in the print table 26, the simulated printed material W ₀ of the front and rear sides with respect to the reference alignment mark N a (N ₀₎ The printing center P of the printing table 26 is assigned as a reference. In this case, the center position R between the front and rear reference alignment marks N (N ₀ ) coincides with the print center P of the print table 26.

Next, as shown in FIG. 8, is moved to a similarly matching unit A and if the reference carrier table 44S positioning the simulated printed material W ₀ in the printing section B of below the printing. In this matching section A, the left and right reference position confirmation marks M (M ₀ ) of the reference transfer table 44S are transferred to the left and right CCD cameras 23 (FIGS. 1, 6).
), And the detected data is sent to the central processing unit 6
0 is input to the storage device 60a and stored as coordinate data (normal position). Further, in the matching section A, both front and rear reference alignment marks N (N ₀ ) of the simulated print W ₀ are detected by the front and rear CCD cameras 21 and 22 (see FIGS. 1 and 6), and the detected data is processed by the central processing unit 60. And store it as coordinate data (normal position) in the storage device 60a.

* Conveyance Table Actual Position Detecting Means and Printed Material Actual Position Detecting Means As schematically shown in FIG. 9, each printed matter conveyance table 44 other than the reference conveyance table 44S is similar to the case of book printing described later. The printing unit B is sequentially moved. A position confirmation mark M is attached to each of the left and right sides of the rear mounting table 48 of both the mounting tables 47 and 48 of each of the printing material transport bases 44 with the printing center P of the print table 26 as a reference. This left and right position confirmation mark M
Is the positional relationship to the print center P of the printing table 26 in the printing section B becomes the same as the left and right reference position check mark M (M _0), the right and left reference position check mark M (M ₀₎ and the left and right position The confirmation mark M overlaps with the print center 26 of the print table 26 in accordance with the print center P. However, both left and right grippers 57 of the reference transfer table 44S are used.
And each of the printing substrate transport tables 44 other than the reference transport table 44S.
The left and right grippers 57 may have a positional relationship shifted from each other in the printing unit B due to a transport error or the like. In the present embodiment, both left and right grippers 57 of the transfer tables 44S and 44 are used.
Has a shift G in the front-back direction X along the transport direction Q in the printing unit B for convenience.

In the matching section A, the reference transfer table 44S
The substrate W to be positioned in each of the substrate transfer table 44 which includes a (simulated printed material W ₀ otherwise) to also simulate the front and rear alignment marks N prints W ₀ of the front and rear reference alignment marks N (N
Pre-supply before supply with the same positional relationship as in ₀ ).

As schematically shown in FIG. 9, each of the printing object transport tables 44 including the reference transport table 44S is sequentially moved to the aligning section A to be at the same position as will be described in detail later in the main printing. Shall stop. In this case, both left and right position confirmation marks M on the mounting table portion 48 of each printing material transport table 44 are detected by the left and right CCD cameras 23 (see FIGS. 1 and 6), and the detected data is input to the central processing unit 60. And store it in the storage device 60a as coordinate data (actual position). In the central processing unit 60, the arithmetic unit 60c compares the actual position of the left and right position confirmation mark M with the pre-stored normal position of the left and right reference position confirmation mark M (M ₀ ). The shift G is calculated as correction data, and the correction data is stored in the storage device 60a.

Further, the printing material W is supplied to the alignment table 2 and positioned as described later in the main printing. In this case, the front and rear alignment marks N on the print substrate W are detected by the front and rear CCD cameras 21 and 22 (see FIGS. 1 and 6), and the detected data is input to the central processing unit 60 and stored in the storage device 60a. It is stored as data (actual position).

* Position Adjustment Control Means for Matching Table 2 From the state schematically shown in FIG. 9, in the central processing unit 60, the control unit 60b sets the reference for both the front and rear of the printing material W read from the storage device 60a. Alignment mark N
The position adjustment drive unit 5 adjusts the coordinate data (actual position) related to both the front and rear alignment marks N of the printing material W read from the storage device 60a to the coordinate data (normal position) related to (N ₀ ). Servo motors 18 and 1
9 and 20 (see FIGS. 4 and 6) to drive the matching table 2
Adjust the position of. Therefore, although not shown, the printing substrate W
Are aligned with the front and rear reference alignment marks N (N ₀ ), and the center position R between the front and rear alignment marks N is the front and rear reference alignment marks N.
It coincides with the matching center R ₀ of the matching table 2 which is the center position between (N ₀ ).

Further, as schematically shown in FIG. 10, in the central processing unit 60, the control device 60b reads the left and right reference position confirmation marks M (M) of the printing material transfer table 44 read from the storage device 60a. ₀ ) and the coordinate data (actual position) related to both the left and right position confirmation marks M of the print-substrate 44 read from the storage device 60a. The servo motors 18, 19, and 20 (see FIGS. 4 and 6) of the position adjustment drive unit 5 are driven based on the correction data for the position adjustment unit 2 to adjust the position of the matching table 2. Therefore, both the left and right position confirmation marks M of the print substrate transport table 44 coincide with the left and right reference position confirmation marks M (M ₀ ), and the shift G schematically shown in FIG. 9 is eliminated. On the other hand, the front and rear alignment marks N of the printing medium W move in the direction along the transport direction Q by this shift G with respect to the front and rear reference alignment marks N (N ₀ ). center position R moves only in the direction along the conveying direction Q the deviation G with respect to matching the center R ₀ matching table 2.

<Transporting Action of Printed Material W During Main Printing as Shown in FIGS. 7 and 9 to 11> * State (Alignment Section A) in FIG. Lifting unit 11
(Refer to FIG. 6) and stops above the alignment table 2 at the lower movement position. In both the front and rear mounting tables 47 and 48 of the substrate transporting base 44, the left and right grippers 57 (see FIGS. 2 and 3) are separated from each other and unlocked by driving units 58 and 59 (see FIG. 6).

* The state of FIG. 7B (matching unit A) In the state of FIG.
), The front and rear mounting tables 47 and 48 of the printing medium transport table 44 are inserted into the front and rear avoidance grooves 6 and 7 of the alignment table 2, and each suction table of the alignment table 2. The central suction table 8 of the sections 8 and 9 is inserted into the avoidance hole 55 of the printing medium transport table 44, and the mounting surfaces 47 a and 48 a on the front and rear mounting tables 47 and 48 and each of the alignment tables 2. The mounting surfaces 8a and 9a on the suction bases 8 and 9 are flush with each other.

7 (c) (matching section A) When the printing material W is supplied from the supply device 4 onto the matching table 2 in the state of FIG. 7 (b), the printing material W The support table 8a, 9a, 47a, 48a is supported by being supported on the mounting table 8a, 9a, 47a, 48a.
Is adsorbed.

Next, as described above with reference to FIGS. 9 and 10, the position adjustment control means for the alignment table 2 adjusts the alignment center R ₀ of the alignment table 2 and the position of the printing material W with respect to the printing material transport base 44. The center position R of the printing material W is shifted from the alignment center _R0 by a shift G generated when the printing material transport base 44 moves from the alignment portion A to the printing portion B.

Next, the left and right grippers 57 (see FIGS. 2 and 3) of the front and rear mounting tables 47 and 48 of the substrate to be printed 44 approach each other by driving units 58 and 59 (see FIG. 6). The four corners of the printing substrate W are locked and positioned, and the suction of the alignment table 2 is released.

7 (d) (matching part A) In the state of FIG. 7 (c), the matching table 2
), The front and rear mounting tables 47 and 48 of the printing medium transport table 44 are separated from the front and rear avoidance grooves 6 and 7 of the alignment table 2 and each of the suction tables 8 of the alignment table 2. , 9 move away from the substrate transporting base 44, the central suction platform 8 separates from the avoidance hole 55 of the substrate transporting base 44, and the substrate W is transferred from the alignment table 2 to the substrate transporting base 44. Is done.

7 (e) (printing section B) The printing object transporting base 44 having positioned the printing object W in the state of FIG. 7 (d) moves from the alignment section A to the printing section B, and moves up and down. 33 (see FIG. 6), the print table 2 at the lower position
Stop above 6.

In this case, as shown in FIG. 10, the printing material W transferred from the alignment table 2 to the printing material transporting base 44.
Is the alignment center R ₀ of the alignment table 2 and the print table 26
Is transported to the print center P of the print table 26 at an actual transport distance L + G obtained by correcting the reference transport distance L between the print table P and the print center P by the shift G.

7 (f) (printing section B) When the print table 26 is moved upward by the lifting / lowering section 33 (see FIG. 6) in the state of FIG. The mounting tables 47 and 48 are inserted into the front and rear avoidance grooves 28 and 29 of the printing table 26, and the center suction table 30 of the suction tables 30 and 31 of the printing table 26 The mounting surface 47 on the front and rear mounting tables 47 and 48 is inserted into the avoidance hole 55 of the transfer table 44.
a, 48a and the suction table portions 30, 31 of the print table 26
The upper mounting surfaces 30a and 31a are flush with each other. The printing material W is positioned on the printing material transport base 44,
A vacuum pump 32 is provided on each of the mounting surfaces 8a and 9a of the alignment table 2.
(See FIG. 6).

In this state, the reference transfer table 44 shown in FIG.
Assuming that the distance between the front and rear mounting tables 47 and 48 of S with respect to the printing center P of the print table 26 is K, the front and rear mounting tables 47 and 48 of the printing medium transport table 44
The distance between the print center P and the print center P is KG and K, respectively.
+ G, and a conveyance error occurs by this deviation G.

Thereafter, printing is performed on the printing material W by the printing mechanism 27. 7 (g) (printing section B) After printing, the suction of the printing table 26 by the vacuum pump 32 (see FIG. 6) is released in the state of FIG. 6), the front and rear mounting tables 47, 4 of the printing medium transport table 44 are moved.
8 is separated from the front and rear avoidance grooves 28 and 29 of the printing table 26, and as the suction table portions 30 and 31 of the printing table 26 are separated from the printing material transfer table 44, the central suction table section 30 The printing material W is removed from the avoidance hole 55 of the printing material transport base 44, and the printing material W is transferred from the print table 26 to the printing material transport base 44.

7 (h) (discharge unit C) The print material transport table 44 in which the print target W after printing is positioned in the state of FIG. 7 (g) moves from the printing unit B to the discharge unit C. . Thereafter, both the front and rear mounting table portions 4 of the printing medium transfer table 44
The right and left grippers 57 (see FIGS. 2 and 3) are separated from each other by the driving units 58 and 59 (see FIG. 6) and unlocked at 7, 48, and the printed material W is printed by the discharge conveyor 40. It is carried out from 44.

<Characteristics of this Embodiment> This embodiment has the following characteristics (other than other technical ideas described later). In the printing medium transport mechanism 1 shown in FIG. 1, when the same output signal is sent from the central processing unit 60 to the drive motor 45 shown in FIG.
Should be moved by the same transport distance (reference transport distance L shown in FIGS. 8 to 10). However, as described above, a shift G (see FIGS. 9 to 11) due to a transport error may occur between the respective print substrate transport tables 44 in the printing unit B. Therefore, the print medium W positioned at the alignment center R ₀ of the alignment table 2 is shifted beforehand by the shift G before the conveyance, and the conveyance start point of the print medium W (front and rear sides) with respect to the print center P of the print table 26 at the fixed position. The center position R between the alignment marks N) is changed, and the distance between the conveyance start point (center position R) and the print center P (actual conveyance distance L + G shown in FIG. Was adjusted every time. Therefore, even if the same output signal is sent from the central processing unit 60 to the drive motor 45, each of the substrates 44 to be printed is actually transported distance L + G.
And the center position R of the printing medium W is shifted to the printing center P.
Matches. Therefore, the printing object W can be accurately conveyed to the printing center P of the printing table 26 to obtain a good printing state.

In the printing section B, the displacement of each printing material transport table 44 is not only a displacement along the transport direction Q (the front-rear direction X) (the displacement G) but also a displacement along the left-right direction Y only. In some cases, the original position and the actual position of each printing material transport table 44 are compared with each other by using a coordinate value, and the shift in the transport direction Q is performed. G is obtained, and the matching table 2 is adjusted according to the deviation G.

[Other technical ideas] The technical ideas (other than the claims) that can be grasped from the embodiment will be described. According to the following (a), (b), (c), and (d), the alignment table 2 in which the printing material W is positioned is adjusted according to the shift G that can occur between the printing material transport tables 44 in the printing section B, The printing medium W can be transported to the printing center P of the printing table 26 as accurately as possible.

(A) The processing apparatus (central processing unit 60) according to claim 2 or 3 is arranged such that each of the substrates 44 to be printed reaching the printing section B in the processing path 46a has a correct position with respect to the printing center P of the printing table 26. And the print center P of the print table 26 for each substrate transfer table 44 that reaches the printing section B in the processing path 46a.
And a shift G obtained from a position error between the normal position of the printing material transfer table 44 and the actual position of the printing material transfer table 44.
And a position adjustment control means for adjusting the position of the alignment table 2 by driving only the position adjustment drive unit 5.

(B) The processing device (central processing unit 60) according to claim 3 stores the correct position of the printing material W supplied to the printing table 26 and positioned with respect to the printing center P of the printing table 26. Position storage means, print substrate actual position detection means for detecting the actual position of the print substrate W supplied and positioned to the matching table 2, and adjusting the actual position of the print substrate W to the normal position of the print substrate W And a position adjustment control means for driving the position adjustment drive unit 5 to adjust the position of the matching table 2.

(C) The transport base normal position storage means in the above (a) stores the reference position confirmation mark M () on the reference transport table 44S which is the specific print substrate transport table 44 among the print substrate transport tables 44 in the printing section B. M ₀ ), the reference carrier 44S is moved to the matching section A, and the reference position confirmation mark M (M ₀ ) of the reference carrier 44S is detected by the position confirmation sensor (CCD camera 23) in the matching section A. Is stored as the correct position.

The transport table actual position detecting means in (a) uses the position confirmation sensor (CCD camera 23) to detect the position confirmation mark M attached to each print substrate transport table 44 that has reached the matching section A in the processing path 46a. This is detected and stored as an actual position.

In this case, the position confirmation mark M for each of the substrates to be printed 44 other than the reference carriage 44S is the same as the reference position confirmation mark M (M ₀₎ regarding the positional relationship with the print center P of the print table 26 in the printing section B. ).

The position adjustment control means in the above (A)
A correct position read from the transfer table correct position storage means,
The position adjustment drive unit 5 is driven by a shift G obtained from a position error between the actual position detected by the transfer table actual position detecting means and the actual position.

(D) The printing medium normal position storage means in the above (b) is provided in the printing section B with each of the printing medium transport tables 44.
Of the reference transport table 44S, which is the specific print substrate transport table 44
In addition to positioning the simulated printed material W _0, while positioning the simulated printed material W ₀ in the print table 26, denoted by the reference alignment mark N (N ₀₎ to the simulated printed material W _0, the simulated printed material W ₀ Reference carrier 44 positioned
S is moved to the alignment section A, and the reference alignment mark N (N ₀ ) of the simulated printed matter W ₀ positioned at the reference transport table 44S in the alignment section A is detected by the alignment sensors (CCD cameras 21 and 22). Is stored as the normal position.

The printing medium actual position detecting means in (b) detects the alignment mark N provided on the printing medium W supplied to the alignment table 2 and positioned by the alignment sensor (CCD cameras 21 and 22). And stores it as an actual position.

The position adjustment control means in the above (b)
The position adjustment drive unit 5 is driven so that the actual position detected by the actual print position detecting unit is adjusted to the correct position read from the normal print position storage unit.

According to the following (e), (f) and (g),
Since the printing substrate W can be supported at the four corners by the mounting table portions 47 and 48 of the printing substrate transport base 44, the printing substrate W is transported in a stable state without sagging, and for example, the printing substrate W such as an electric wiring board. Can be prevented from being damaged. In addition, since the avoidance hole 55 is provided between the mounting table portions 47 and 48, for example, the printing material W is superimposed on the alignment table 2 or the printing table 26 and the printing material transfer table 44.
Can be reliably attracted to the alignment table 2 and the printing table 26 via the avoidance holes 55.

(E) In claim 1, claim 2, claim 3, claim (a), (b), (c), or (d), the transport mechanism 1 is a winding transmission mechanism, A plurality of printing material transport tables 44 are attached to the winding transmission link (transmission chain 43), and each of the printing material transport tables 44 moves with the rotation of the winding transmission link (transmission chain 43). 44 are provided with mounting tables 47 and 48 for positioning both sides of the printing material W on both sides of the processing path 46a in the movement direction X, and avoidance holes 55 are provided between the mounting tables 47 and 48.
Was provided.

(F) In the above (e), each of the printing material transport tables 44 has mounting surfaces 47a and 48a for supporting the printing material W on the front side of both the mounting table portions 47 and 48, respectively. In the processing path 46a, the two mounting tables 47 and 48 are moved with their front sides facing upward, and are turned upside down at the boundary between the processing path 46a and the return path 46b in the discharge section C, and are both reversed in the return path 46b. , 48 with the back side facing downward, and upside down at the boundary between the return path 46b and the processing path 46a in the alignment section A.

(G) In the above (e) or (f), both the mounting tables 47 and 48 of the substrate transporting base 44 are
There is a positioning means 56 which can be in a locked state for positioning the printing object W and a state for releasing the lock.

[0060]

According to the printing material transport device of the screen printing machine according to the present invention, the printing material () is determined in accordance with a shift (G) that can occur between the printing material transport tables (44) in the printing section (B). Since the alignment table (2) in which the position (W) is positioned can be adjusted, the substrate (W) to be printed is moved to the print table (2).
It can be conveyed as accurately as possible to the printing center (P) of 6).

[Brief description of the drawings]

FIG. 1 is a side view schematically showing a screen printing machine and a device for transporting a printed material according to the present embodiment.

FIG. 2 is a plan view schematically showing the printing medium transporting apparatus of FIG. 1;

FIG. 3A is a plan view schematically illustrating a transfer table of the printing medium transfer apparatus, and FIG. 3B is a side view schematically illustrating the transfer table.

FIG. 4A is a schematic enlarged side view showing an alignment table and a position adjustment drive unit, and FIG. 4B is a schematic enlarged plan view of the same.

FIG. 5 is a schematic view of the printing mechanism and the like in FIG. 1 as viewed from the rear side.

FIG. 6 is a block circuit diagram schematically showing an electrical configuration of the present embodiment.

FIG. 7 is an operation explanatory view of the printing medium transporting apparatus.

FIG. 8 is an operation explanatory diagram mainly related to a transport base correct position storage unit and a print medium correct position storage unit in the present embodiment.

FIG. 9 is an operation explanatory diagram mainly related to a transport base actual position detecting unit and a printing substrate actual position detecting unit in the present embodiment.

FIG. 10 is an operation explanatory diagram mainly related to position adjustment control of an alignment table and conveyance control of a printing medium in the embodiment.

FIG. 11 is an operation explanatory diagram illustrating a state of a printing medium transport table that has moved to a printing unit in the present embodiment.

FIG. 12 is an operation explanatory view of a printing medium transport device in a conventional screen printing machine.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Printed object conveyance mechanism, 2 ... Alignment table, 5 ... Position adjustment drive part, 18, 19, 20 ... Servo motors 21, 21
2: CCD camera (positioning sensor), 23: CCD camera (position confirmation sensor), 45: drive motor, 60: central processing unit, 26: printing table, 27: printing mechanism, 4
Reference numeral 4: Printed object transport table, 44S: Reference transport table, 46a: Processing path, 46b: Return path, 60: Central processing unit, W: Printed object, Q: Transport direction, A: Alignment unit, _R0 : Alignment center, B
... Printing part, P ... Printing center, C ... Ejecting part, G ... Shift, L ...
Reference transport distance, L + G: Actual transport distance.

Claims (3)

[Claims] An alignment section for supplying and positioning a printing medium, a printing section for performing printing on a printing medium after positioning by a printing mechanism, and a discharge section for discharging the printing medium after printing are arranged side by side. In the screen printing machine, a transport mechanism is disposed between the alignment unit, the printing unit, and the discharge unit, and a plurality of print substrate transport tables are attached to the transport mechanism, and each of the print substrate transport units drives the transport mechanism. By
A processing path from the alignment section to the output section through the printing section, and a return path from the output section to the alignment section through the printing section; And a position adjustment drive unit that adjusts the position of the alignment table, wherein the printing unit is provided with a printing material transport table that reaches the printing unit on the processing path. A printing table in which the printing medium is transferred between the printing mediums, and among the printing medium transport tables that reach the printing unit in the processing path, a reference transport table that is a specific printing object transport table, and a print medium other than the reference transport table. The position adjustment drive unit is driven so as to adjust the position of the alignment table that has positioned the printing object at the alignment center only by the shift in the transport direction generated between the alignment table and the transport table. The reference transport distance between The actual transport distance was corrected by,
A printing material transport device for a screen printing machine, comprising: a processing device that drives a transport mechanism to transport a printing material transferred from an alignment table to a printing material transport table to a printing center of a printing table. 2. An aligning section for supplying and positioning a printing medium, a printing section for performing printing on a printing medium after positioning by a printing mechanism, and a discharge section for discharging the printing medium after printing. In the screen printing machine, a transport mechanism is disposed between the alignment unit, the printing unit, and the discharge unit, and a plurality of print substrate transport tables are attached to the transport mechanism, and each of the print substrate transport units drives the transport mechanism. By
A processing path from the alignment section to the output section through the printing section, and a return path from the output section to the alignment section through the printing section; And a position adjustment drive unit that adjusts the position of the alignment table, wherein the printing unit is provided with a printing material transport table that reaches the printing unit on the processing path. A printing table in which the printing medium is transferred between the printing tables, and the respective printing material transport tables that reach the printing unit in the processing path reach the correct position with respect to the printing center of the printing table and reach the printing unit in the processing path. The position adjusting drive is driven so as to adjust the position of the alignment table where the print object is positioned by the shift generated between the print object transport table and the actual position of the print table with respect to the print center, and the print position is adjusted from the alignment table. Transferred to the printed matter carrier The substrate conveying device of the screen printing machine, characterized in that it includes a processing unit for driving the transport mechanism to transport the printing medium to the printing center of the printing table. 3. A position adjustment drive unit is driven so that an actual position of a printing material reaching the matching unit in the processing path is adjusted to a normal position of each printing material reaching the matching unit in the processing path. A processing device that adjusts the position of the alignment table on which the print object is positioned, and drives the transport mechanism to transport the print material transferred from the alignment table to the print object transport table to the print center of the print table. 3. The apparatus according to claim 2, wherein the apparatus is provided with a printing medium.